[Expert] 3GS Stuck in DFU mode after upgrade to 4.3.3

[DjGeNeSiS]

Hello all,

I have spent two days browsing the web to find out what I've done wrong and I really can't solve my problem.

I have an iPhone 3GS on 3.1.3 happily jailbroken with Cydia and everything..
I decided to update the firmware to 4.3.3 in order to be able to install my favourite apps since my 3.1.3 is quite outdated.

-> I downloaded sn0wbreeze v2.7.3 and the appriopriate .ipws (4.3.3 for iPhone 3GS)
-> I ran sn0wbreeze on Expert mode, selected "New Bootrom" and generated the jailbroken ipsw on my desktop
-> I put my device into pawned DFW mode
-> Downloaded tinyUmbrella and started the server (i pinged gs.google.com and the reply comes from the cydia server)
-> Opened iTunes and selected the IPSW for restore.

I tried to restore but at the end, I got the error 37 no matter how many times I tried. I googled around and found out that my IPSW file might be the issue. I tried differrent combinations with sn0wbreeze and eventually I selected "Old Bootrom" for the IPSW.
The firware update went successfully but my iPhone is stuck on DFU mode. It does not turn on.

I tried:
->fixrecovery43,
->TinyUmbrella
->Start tethered from Redsn0w

but none of it seems to work.
I tried restoring to the original 4.3.3, I get the same error (37)
I tried restoring to the official IOS from iTunes but I get the error 28.

At this stage, my iPhone is stuch on a black screen on DFU mode and there's a more serious issue.
I am running iRAB from sn0wbreeze, the system says my iPhone is on pwned DFU mode, and when I am trying to restore from iTunes, I get the 1601 error........

I still have some reading to do with the SHSH blob or whatever that is but I think I'm running out of options.

Can anyone help me out you guys?